Ripping knife



FIG. 1 is a front perspective view of a ripping knife, showing my newdesign;

FIG. 2 is a right side elevational view thereof, the left sideelevational view is a mirror image of FIG. 2;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a rear elevational view thereof.

The ornamental design for a ripping knife, as shown and described.